InkNink Remanufactured Ink Cartridge Replacement for HP 45 and HP 78 (1 Black 51645A, 1 Color C6578DN) InkNInk ISO 9001 cerified, remanufactured premium quality, and high yield InkNInk offers ink cartridges with 2 years shelf life All ink cartridges are sealed in their retail packagings Hassle free returns for all our products. Must be sealed and with its original packaging Fast USPS first class mail shipping and high customer service